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Mars Exploration rover | Photo Contest
This black-and-white image shows two fresh trenches, one on top of each other, into whitish soil exposed by Spirit's dragging right front wheel. To the left of them is a normal track that barely penetrates the surface and is as dark gray as the wind-rippled sand all around.
Spirit
  |  
Trench

Martian soils are a study in contrasts, as Spirit discovered when a stuck wheel dug a trench into white soil buried beneath a dark veneer.
Click on the 16 images below to see larger view
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